LG 50UH5500 Service Manual

Chassis: 6l60n

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LED TV

SERVICE MANUAL

CHASSIS : 6L60N

MODEL : 50UH5500

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

Internal Use Only

Summary of Contents for LG 50UH5500

Page 1 Internal Use Only LED TV SERVICE MANUAL CHASSIS : 6L60N MODEL : 50UH5500 CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Page 2 BLOCK DIAGRAM .................. 26 EXPLODED VIEW .................. 34 DISASSEMBLY ..................35 SCHEMATIC CIRCUIT DIAGRAM ........... APPENDIX TROUBLE SHOOTING GUIDE ..........APPENDIX - 2 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 3 An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 5 1. Clip each fuse or resistor lead at top of the circuit board hollow stake. 2. Securely crimp the leads of replacement component around notch at stake top. - 5 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 6 Rear (1EA), USB Input(3EA) EMF, DivX HD, For SVC (download) Side(1)/Rear(2) :JPEG, MP3, DivX HD (Exception, UA65S: USB 1EA) - 6 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 7 AC100 ~ 240V, 50/60Hz Display Colors 1.07 B (10-bit) 1.07G colors (8-bit+FRC) V580DJ2-KS5 1.067G V500DJ2-KS5 Surface Treatment Hard coating (2H), Anti-glare - 7 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 8 297.00 Only UD Model 3840*2160 297.00 Only UD Model 4096*2160 53.95 23.97 Only UD Model 4096*2160 Only UD Model - 8 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 9 4096*2160 61.43 29.97 296.703 UDTV 2160P 4096*2160 67.5 30.00 UDTV 2160P 4096*2160 59.94 UDTV 2160P 4096*2160 60.00 UDTV 2160P - 9 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 10 29.976 / 30.00 148.35/148.5 Side-by-side(Full) (HDTV 1080P) 67.43 / 67.5 59.94 / 60 148.35/148.50 Top-and-Bottom Primary(HDTV 1080P) Side-by-side(half) Secondary(HDTV 1080P) - 10 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 11 Top & Bottom(half), Side by Side(half), Port3 Only Others 640*350 2D to 3D, 720*400 Side by Side(half), Top & Bottom 640*480 800*600 1152*864 - 11 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 12 3D input proposed mode 1080P 33.75 Side by Side(Half), Top & Bottom, Checker Board, MPO(Photo) 2160p 67.5 MPO(Photo), JPS(Photo) - 12 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 13 **Remark: 3D Input mode Side by Side Top & Bottom Checkerboard Single Frame Frame Packing Line Column Sequential Interleaving Interleaving LLLLL - 13 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 14 ▪ xb 00 06 [Change input source to RGB(1024*768)] ▪ ad 00 10 [Adjust 1920*1080 RGB] ▪ aa 00 90 End adj. - 14 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 15 (1) Play the LAN Port Test PROGRAM. (2) Input IP set up for an inspection to Test Program. * IP Number : 12.12.2.2. - 15 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 16 C. Serial number D/L must be conformed when it is produced in production line, because serial number D/L is mandatory by D-book 4.0 - 16 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 17 : ‘2016’ -> ‘1A' / HDMI3 / HDMI4 are Writing and display OK or NG. ⓓ Model Name(Hex): LGTV For HDMI EDID ⓔ Checksum(LG TV): Changeable by total EDID data. DVI-D to HDMI or HDMI to HDMI ⓕ Vendor Specific(HDMI) 5.2.4.1. EDID...
Page 20 00 7C 2D ONLY HDMI1 0x9F, 0x11 0x9F, 0XB6 HDMI2 0x9F, 0x01 0x9F, 0XA6 HDMI3 0x9F, 0xF1 0x9F, 0x96 - 20 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 21 RS -232C Pat t ern Generat o r Signal Source * If TV internal pattern is used, not needed - 21 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 22 Gain adj.(internal white pattern) Gain adj. completed Offset adj.(internal white pattern) Offset adj. completed End White Balance adj. (internal pattern disappears ) - 22 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 23 Coordinate Mode Temp △uv Cool 0.271±0.002 0.270±0.002 13000K 0.0000 Medium 0.286±0.002 0.289±0.002 9300K 0.0000 Warm 0.313±0.002 0.329±0.002 6500K 0.0000 - 23 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 24 ▪ After final inspection, press In-Stop key of the Adj. R/C and check that the unit goes to Stand-by mode. - 24 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 25 (2) Select "Tool Option 1" and Push “OK” button. (3) Punch in the number. (Each model has their number.) - 25 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 28 IC2301 0.02A 0.2A 1.8V eMMC 0.6A 1.2V Tuner 2A TJ2132 0.4A TUNER Panel LNB(EU option) 13.2V Audio 20W 2ch - 28 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 34 Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Set + Stand - 34 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 35 (with descriptions and arrows identifying locations) can be inserted below: - 35 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
Page 39 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2015-01-08 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR MAIN1_SYSTEM THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 40 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. K2L POWER 11/05/31 LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 41 2015-04-27 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. K2L DDR LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 42 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 15/04/27 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR MAIN4_EXT_IN/OUTPUT THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 43 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2015-01-18 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. K2L_GND LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 44 2015-01-10 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR PCMCI THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. PCMCI LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 45 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2015-01-10 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. PWR_1 LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 46 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2015-01-10 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR PWR_2 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 47 K2L / K2Lp 2015-06-13 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MICOM LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 48 2015-01-10 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR MODEL OPTION THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 49 2015-01-10 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR HDMI THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. HDMI LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 50 UF71/7500 2014-07-24 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. JACK_COMMON_H LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 51 UF71/7500 2014-05-19 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. IR/KEY LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 52 2015-04-27 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. USB2.0 jack LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 53 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR USB 2 & 3 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 54 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2014-12-15 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR LAN_H THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 55 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR MAIN_AMP THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 56 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR HP_AMP THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 57 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2014-10-17 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. TU_CIRCUIT LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 58 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2014-09-11 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR TU_SYMBOL_H THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 59 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 60 2014-08-27 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Vx1 51P LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 61 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 2014-11-17 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR eMMC THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 62 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR RS232C THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 65 Circuit noise, mechanical noise F. Exterior error Exterior defect First of all, Check whether there is SVC Bulletin in GSCS System for these model. LGE Internal Use Only Copyright 2016 LG Electronics Inc. All rights reserved. Only for training and service purposes...
Page 66 Overview for ’16 ULTRA HD Model K2Lp (Hardware)
Page 67 `16 ULTRA HD New Feature 1. HDMI • All HDMI ports support ULTRA HD Deep Color. HDMI2.0 6Gbps HDMI1.4 Classification HDMI1.4 HDMI2.0 3Gbps 4K@60Hz HDCP2.2 Legacy 4:2:2 10bit HDMI 3 HDMI 2 HDMI 1 • If the device connected to Input Port also supports ULTRA HD Deep Color, your picture may be Clearer.
Page 68 LCD TV Repair Guide `16 years New Models < Applicable Model > UH55...
Page 69 Main PCB(210X183) UH55 Power From PSU Main processor_(K2Lp), DDR Memory eMMC Memory T-CON B/D Micom for Key/IR sensing (VX1) Audio AMP Wifi Local Key +IR Audio...
Page 70 `16Y ULTRA HD Block Diagram Contents System Overview (Main External) K2Lp Block Diagram (External) 표지 K2Lp Block Diagram (Internal) K2Lp I2C Diagram K2Lp Power Block Diagram Tuner/CI Block Diagram Video/Audio In Block Diagram Audio Out Block Diagram HDMI USB / WIFI / UART 10.
Page 71 0. System Overview (Main External) •ONLY 60HZ(T120) Model <15 year UHD model> <16 year UHD model> 1.25GB 4K@60PX3EA VX1 4K 60HZ K2Lp...
Page 72 1. K2Lp Circuit Block Diagram DDR3 2133 X 32 X_TAL (512MB X 2EA) 24MHz (external) EU ONLY P_TS_IN DDR3 1866 X 32 CI Slot (128MB X 2EA) (intern P_TS_OUT NVRAM (256Kb) I2C 4 Vx1 51P (8 lane) eMMC (4GB) I2C 6 Realtek K2Lp USB1 (2.0)
Page 73 2. K2Lp Block Diagram (Internal) LGE Confidential...
Page 74 3. K2Lp I2C Block Diagram I2C_SCL4 I2C_SCL6 IC5800 P7100 B 3 [VSYNC] H2[GPIO_T_SCL] I2C_SDA6 100Ω NTP7515 I2C_SDA4 Vx1 51P B 2 [HSYNC] H1[GPIO_T_SDA] IC101 TCON_I2C_EN 33 Ω NVRAM +3.3V_NOR +3.3V_NOR Realtek K2Lp I2C_SCL I2C_SCL2 F10 [ST_IO09] IC3000 TU6701 F13[ST_IO02] 33 Ω I2C_SDA I2C_SDA2 R5F100GEAFB...
Page 75 4. K2Lp Power Block Diagram [UH55 Main] 3.5V ST-BY 4A 0.75A 13.2V (TI , TPS56428) IC2306 2. 47A 0. 7A SoC-K2L WIFI 0.18A 1.05V_CPU/GPU 4A(, RT7231 0.17A ,IC2300) 1.97A MICOM/IR/ETC 1.0V_CORE DC DC 0.1A 0.51A 10A(TI, TPS51362 1.0V ETH ST LDO 5.68A ,IC2305) 0.
Page 76 5. Tuner/CI Block Diagram +3.3V_NORMAL +3.3V_TU 1.8K Ω [+3.3V_TUNER] 11 AM5 [GPIO1_T_SCL] I2C_SCL2 33 Ω [I2C_SCL2_TU] 27 AM4 [GPIO2_T_SDA] I2C_SDA2 [I2C_SDA2_TU] 30 TDJS-H351F K2Lp IF_P [IF_P_TU] 6 AT2 [IF_P] IF_N [IF_N_TU] 7 AT3 [IF_N] [TU_CVBS_TU] 8 AG1 [VIN10P] IF_AGC [IF_AGC_TU] 3 AM6[GPIO0_RF_IF_AGC1] LGE Confidential...
Page 77 6. Video/Audio In Block Diagram Jack Side SOC Side K2Lp COMP1_Y/CVBS [VIN4P] E2 COMP1_Pb [VIN3P] D2 COMP1_Pr [VIN5P] E3 COMP1/AV1/DVI_L_IN [AI1L] A4 COMP1/AV1/DVI_R_IN [AI1R] B4 SPDIF OUT SPDIF_OUT [SPDIF_OUT] C5 IC6100 H/P JACK HP_L/ROUT_AMP HP_L/ROUT [HPOL/R] F4/F5 US Model use this jack fo r SVC(RS-232C).
Page 78 7. Audio Out Block Diagram AV/COMP AUD_SCK COMP1/AV1/DVI_L/R_IN GPIO90_SCLK [AM27] [38] CLK_I [A4] AI1L [B4] AI1R AUD_LRCK SPK_L+ / L- GPIO89_WCLK [AK28] [8] WCK AUD_LRCH [30, 33] SPK L GPIO93_MCLK [AL27] [7] AUD_LRCH MAIN AMP I2C_SDA4 / SCL4 GPIO1_T_SCL[H2] [10,11] NTP7515 GPIO2_T_SDA[H1] AMP_RESET_N...
Page 79 8. HDMI DDC 5V PULL-UP HDMI_HPD_3 ST_IO25_H2_SCL [G5] DDC_SCL1 / DDC_SDA1 ST_IO26_H2_SDA [E6] CEC_Remote TMDS1 -D0/D1/D2/CLK DDC 5V PULL-UP HDMI_HPD_2 ST_IO24_H1_HPD [F6] K2Lp DDC_SCL2 / DDC_SDA2 ST_IO22_H1_SCL [C6] CEC_Remote ST_IO23_H1_SDA [B6] TMDS2 -D0/D1/D2/CLK DDC 5V PULL-UP HDMI_ARC HDMI_HPD_3 ST_IO21_H0_HPD [A7] DDC_SCL3 / DDC_SDA3 ST_IO19_H0_SCL [C7] CEC_Remote...
Page 80 9. USB / WIFI / UART USB_CTL3 /USB_OCD3 [L3] +5V_USB_2 (IC4400) USB_CTL3 [L4] USB3_DM / DP HSDM1[AM3] USB1 HSDP1 [AL3] K2Lp USB Wi-Fi 4, 6 WIFI_DM / DP HSDM3 [A17] HSDP3 [A18] Wafer M_RFModule_RESET (P4100) GPIO93_MCLK [AL27] WOL/WIFI_POWER_ON SOC_RX / TX RS232C ST_IO12 [E9] ST_IO13 [D9]...
Page 81 10. WOL TDP/TDN,RDP/RDN +3.5V_ST +3.5V_WOL IC5201 WOL/ETH_POWER_ON Switch IC WOL_CTRL +3.5V_ST K2Lp +3.5V_ST +3.5V_WIFI MICOM IC4102 POWER ON Switch IC WIFI_EN WOL/WIFI_POWER_ON +3.5V_WIFI WiFi WIFI_DP/DM LGE Confidential...
Page 82 TROUBLE SHOOTING GUIDE...
Page 83 Contents of Standard Repair Process Error symptom (High category) Error symptom (Mid category) Page Remarks No video/Normal audio No video/No audio Picture broken/ Freezing A. Video error Color error Vertical/Horizontal bar, residual image, li ght spot, external device color error No power B.
Page 84 Standard Repair Process Established A. Video error Error date LCD TV symptom No video/ Normal audio Revised date 1/16 First of all, Check whether all of cables between board is inserted properly or not. (Main B/D↔ Power B/D, VX1 Cable, Speaker Cable, IR B/D Cable,,,) ☞A1 ☞A18 No video...
Page 85 Standard Repair Process Established A. Video error Error date symptom No video/ No audio Revised date 2/16 ☞A18 Check various voltage Check and Normal No Video/ s of Power Board ( 13 replace MA voltage? No audio IN B/D Replace Power Bo ard and repair part...
Page 86 Standard Repair Process Established A. Video error Error date symptom Picture broken/ Freezing Revised date 3/16 . By using Digital signal level meter ☞ A3 . By using Diagnostics menu on OSD Check RF Signal level ( All Settings→ Channels→ Channel Tuning→ Manual Tuning → Signal Strength, Signal Quality) - Signal strength (Normal : over 50%) - Signal Quality (Normal: over 50%) Check whether other equipments have problem or not.
Page 87 Standard Repair Process Established A. Video error Error date symptom Color error Revised date 4/16 ☞ A7 ☞A6 ※ Check an Check color by input d replace Li -External Input Color nk Cable Color Color Replace module -COMPONENT Replace Main B/D error? (V by one) a error?
Page 88 Standard Repair Process A. Video error Established Error date symptom Vertical / Horizontal bar, residual image, Revised date 5/16 light spot, external device color error Vertical/Horizontal bar, residual image, light spot Replace Module ☞A6 ☞ A7 Check color condition by input Check external Check and rep -External Input...
Page 89 Standard Repair Process Established B. Power error Error date symptom No power Revised date 6/16 ☞A17 ☞A18 DC Power on Replace Check Power LED Normal Check Power by pressing Power Key Power Logo LED operation? On ‘”High” On Remote control .
Page 90 Standard Repair Process Established B. Power error Error date symptom Off when on, off while viewing, power auto on/off Revised date 7/16 Check outlet ☞A19 Check Power Off Check A/C cord Error? Normal? Replace Main B/D Mode Abnormal Check for all 3- phase Abnormal Replace Power B/D power out...
Page 91 Standard Repair Process Established C. Audio error Error date symptom Revised date No audio/ Normal video 8/16 ☞A20 ☞A21+A18 Check user m Check audio B+ A No audio Normal enu > 13V of Power Boar Screen normal voltage Speaker off Cancel OFF Replace Power Board and repair parts Check Speake...
Page 92 Standard Repair Process Established C. Audio error Error date symptom Wrecked audio/ discontinuation/noise Revised date 9/16 → abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio ☞A21+A18 Wrecked audio/ Check and replace Discontinuation/ Check audio speaker and conne Noise for B+ Voltage (A13V) ctor...
Page 93 Standard Repair Process D. Function error Established Error date symptom Remote control & Local switch checking Revised date 10/16 1. Remote control(R/C) operating error Replace Main B/D ☞A22 ☞A22 ☞A22 Check & Repair Check B+ 3.5 Check R/C itself Normal Normal Normal Check IR...
Page 94 Standard Repair Process D. Function error Established Error date symptom MR13 operating checking Revised date 11/16 2. MR15(Magic Remocon) operating error (UH55 Model doesn`t support Magic Remocon) ☞A4 Check the INST Check MR15 its RF Receiver ver Normal Turn off/on the s Press the Is show ok ART menu...
Page 95 Standard Repair Process D. Function error Established Error date symptom Wifi operating checking Revised date 12/16 3.Wifi operating error ☞A4 ☞A24 Check the INST Wi-Fi Mac value Check the Wifi wafer Normal Replace ART menu is “NG”? Voltage? 1pin Main B/D ☞A24 Close Check &...
Page 96 Standard Repair Process D. Function error Established Error date symptom Camera operating checking Revised date 13/16 4.Camera operating error (Camera operation is not support) ☞A4 ☞A25 Check the INST Camera Ver. Reconnect the Normal Replace ART menu is “NULL”? operation? Camera module Main B/D Close...
Page 97 Standard Repair Process Established D. Function error Error date symptom External device recognition error Revised date 14/16 Check technical Check in External Input and information Signal Technical put signa Replace Main B/D Component input? - Fix information information? Recognition error - S/W Version HDMI/ Check and fix...
Page 98 Standard Repair Process Established E. Noise Error date symptom Circuit noise, mechanical noise Revised date 15/16 Identify n Check locati Circuit ose type on of noise Replace PSU noise Mechanical Check location o noise f noise ※ When the nose is severe, replace the module ※...
Page 99 Standard Repair Process Established F. Exterior defect Error date symptom Exterior defect Revised date 16/16 Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote control Replace Remote control damage Stand Replace stand dent...
Page 100 Contents of Standard Repair Process Detail Technical Manual Error symptom Content Page Remarks Check LCD back light with naked eye A. Video error_ No video/Normal audi Check White Balance value TUNER input signal strength checking met A. Video error_ video error /Video lag/ stop Version checking method Tuner Checking Part...
Page 101 Contents of Standard Repair Process Detail Technical Manual Error symptom Content Page Remarks Check front display LED B. Power error_ No power Check power input Voltage & ST-BY 3.5V B. Power error_Off when on, off whil POWER OFF MODE checking method e viewing Checking method in menu when there is n o audio...
Page 102 Standard Repair Process Detail Technical Manual Error Established error_No A. Video video/Normal audio symptom date Revised Check White Balance value Content date <ALL MODELS> Entry method Entry method 1. Press the ADJ button on the Remote controlfor adjustment. 1. Press the ADJ button on the Remote control for adjustment. 2.
Page 103 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop symptom date Revised TUNER input signal strength checking method Content date <ALL MODELS>  Advanced Channels Channel Tuning Manual Tuning When the signal is strong, us e the attenuator (-10dB, -15d B, -20dB etc.)
Page 104 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop symptom date Revised Version checking method Content date <ALL MODELS> 1. Checking method for Remote control for adjustment Version Press the IN-START with the Remot e control for adjustment...
Page 105 Standard Repair Process Detail Technical Manual Error Established A. Video error_Video error, video lag/stop symptom date Revised TUNER checking part Content date <ALL MODELS> Checking method: 1. Check the signal strength or check whether the screen is normal when the external device is connected. 2.
Page 106 Standard Repair Process Detail Technical Manual Error A. Video error _Vertical/Horizontal bar, resi Established symptom dual image, light spot date Revised Content connection diagram (1) date <ALL MODELS> As the part connecting to the external input, check t he screen condition by signal...
Page 107 Standard Repair Process Detail Technical Manual Error Established A. Video error_Color error symptom date Revised Adjustment Test pattern - ADJ Key Content date You can view 6 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2.
Page 108 Appendix : Exchange Main Board (1) Solder defect, CNT Broken Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack...
Page 109 Appendix : Exchange Main Board (2) Abnormal Power Section Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack Noise GRADATION GRADATION A - 2/5...
Page 110 Appendix : Exchange Power Board (PSU) No Light Dim Light Dim Light Dim Light No picture/Sound Ok A - 3/5...
Page 111 Appendix : Exchange the Module (1) Panel Mura, Light leakage Panel Mura, Light leakage Press damage Crosstalk Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage A - 4/5...
Page 112 Appendix : Exchange the Module (2) Vertical Line Vertical Block Vertical Block Source TAB IC Defect Source TAB IC Defect Source TAB IC Defect Horizontal Block Horizontal line Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Un-repairable Cases...
Page 113 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power symptom date Revised Content Check front Power Indicator date <50/65UH55> Joystick button ST-BY condition: On or Off Power ON condition: Turn Off North America model doesn`t use lum.sensor...
Page 114 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power symptom date Revised Check power input voltage and ST-BY 3.5V Content date Check the DC 13.2V 50UH5500-UA 65UH5500-UA...
Page 115 Standard Repair Process Detail Technical Manual Error Established B. Power error _Off when on, off whiling viewing symptom date Revised Content POWER OFF MODE checking method date <ALL MODELS> Entry method 1. Press the IN-START button of the Remote cont rol for adjustment 2.
Page 116 Standard Repair Process Detail Technical Manual Error Established C. Audio error_No audio/Normal video symptom date Revised Content Checking method in menu when there is no audio date <ALL MODELS> Checking method 1. Press the Setting button on the Remote control 2.
Page 117 Error Established C. Audio error_No audio/Normal video symptom date Revised Voltage and speaker checking method Content date when there is no audio <50/65UH5500-UA> 50UH5500-UA ② ① ② 65UH5500-UA ③ SPK_R- SPK_R+ Checking order when there is no audio SPK_L- SPK_L+ 1.Check the contact condition of or 13V connector of Main Board...
Page 118 Standard Repair Process Detail Technical Manual Error Established D. Function error symptom date Revised Content Remote control operation checking method date <50/65UH5500-UA> ① +3.5V_WIFI IR & Control Key front WOL/WIFI_POWER_ON_JACK WIFI_DM_JACK WIFI_DP_JACK IR & Control Key Rear KEY2 ② +3.5V_ST LED_R_JACK ③...
Page 119 Standard Repair Process Detail Technical Manual Error Established D. Function error symptom date Revised Content Remote controloperation checking method date < 50/65UH5500-UA> ① Wifi Front +3.5V_WIFI WOL/WIFI_POWER_ON_JACK WIFI_DM_JACK WIFI_DP_JACK KEY2 Wifi Rear ② ③ +3.5V_ST LED_R_JACK Checking order to check wifi Checking order 1.Check BT/Wifi cable condition between BT/Wifi assy &...

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LG 50UH5500 Service Manual

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